Drake knew that the clue his father found in the inn, left by Mary, had been tampered with. Everything in him told him that it had been tampered with. He needed to figure out how to see the truth. He wasn't sure. He tried glowing his eyes, but nothing happened. His gut never lied. He knew that something about the clue was wrong. He just needed to find out what it was.
He had to think for a moment about how they had seen the truth in the clearing of illusion. It was the only time he remembered using the lantern immediately. He knew his eyes had helped, but it was the lamp of truth that showed them that the water was only an illusion. It allowed them to cross the clearing without fear.
